#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# ******************************************************************************
#  $Id$
#
#  Project:  GDAL
#  Purpose:  Application for Google web service authentication.
#  Author:   Frank Warmerdam, warmerdam@pobox.com
#
# ******************************************************************************
#  Copyright (c) 2013, Frank Warmerdam <warmerdam@pobox.com>
#
#  Permission is hereby granted, free of charge, to any person obtaining a
#  copy of this software and associated documentation files (the "Software"),
#  to deal in the Software without restriction, including without limitation
#  the rights to use, copy, modify, merge, publish, distribute, sublicense,
#  and/or sell copies of the Software, and to permit persons to whom the
#  Software is furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included
#  in all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
#  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#  DEALINGS IN THE SOFTWARE.
# ******************************************************************************


import sys
import time
import webbrowser

from osgeo import gdal

SCOPES = {
    'ft': 'https://www.googleapis.com/auth/fusiontables',
    'storage': 'https://www.googleapis.com/auth/devstorage.read_only',
    'storage-rw': 'https://www.googleapis.com/auth/devstorage.read_write'
}

# =============================================================================
# 	Usage()
# =============================================================================


def Usage():
    print('')
    print('Usage: gdal_auth_py [-s scope]')
    print('       - interactive use.')
    print('')
    print('or:')
    print('Usage: gdal_auth.py login [-s scope] ')
    print('Usage: gdal_auth.py auth2refresh [-s scope] auth_token')
    print('Usage: gdal_auth.py refresh2access [-s scope] refresh_token')
    print('')
    print('scopes: ft/storage/storage-rw/full_url')
    print('')
    sys.exit(1)

# =============================================================================
# 	Mainline
# =============================================================================


scope = SCOPES['ft']
token_in = None
command = None

argv = gdal.GeneralCmdLineProcessor(sys.argv)
if argv is None:
    sys.exit(0)

# Parse command line arguments.
i = 1
while i < len(argv):
    arg = argv[i]

    if arg == '-s' and i < len(argv) - 1:
        if argv[i + 1] in SCOPES:
            scope = SCOPES[argv[i + 1]]
        elif argv[i + 1].startswith('http'):
            scope = argv[i + 1]
        else:
            print('Scope %s not recognised.' % argv[i + 1])
            Usage()
            sys.exit(1)
        i = i + 1

    elif arg[0] == '-':
        Usage()

    elif command is None:
        command = arg

    elif token_in is None:
        token_in = arg

    else:
        Usage()

    i = i + 1

if command is None:
    command = 'interactive'

if command == 'login':
    print(gdal.GOA2GetAuthorizationURL(scope))
elif command == 'auth2refresh':
    print(gdal.GOA2GetRefreshToken(token_in, scope))
elif command == 'refresh2access':
    print(gdal.GOA2GetAccessToken(token_in, scope))
elif command != 'interactive':
    Usage()
else:
    # Interactive case
    print('Authorization requested for scope:')
    print(scope)
    print('')
    print('Please login and authorize access in web browser...')

    webbrowser.open(gdal.GOA2GetAuthorizationURL(scope))

    time.sleep(2.0)

    print('')
    print('Enter authorization token:')
    auth_token = sys.stdin.readline()

    refresh_token = gdal.GOA2GetRefreshToken(auth_token, scope)

    print('Refresh Token:' + refresh_token)
    print('')
    if scope == SCOPES['ft']:
        print('Consider setting a configuration option like:')
        print('GFT_REFRESH_TOKEN=' + refresh_token)
    elif scope in (SCOPES['storage'], SCOPES['storage-rw']):
        print('Consider setting a configuration option like:')
        print('GS_OAUTH2_REFRESH_TOKEN=' + refresh_token)
